CBS/Los Angeles is reporting that “dry ice bombs” were found at Los Angeles International Airport on both Sunday and Monday. A bomb exploded Sunday “inside an employee bathroom at LAX’s Terminal 2,” the station reported. Another bomb exploded Monday. Precisely where that bomb detonated was unclear.

Also unclear is whether the bombs were planted all at once or over a period of days and precisely how they detonated. Police are at the scene, assisted by the FBI, the station reported.

No injuries were reported. The airport remains open.

Other, undetonated bombs have been found at the airport, the station reported.